Amirkabir University of Technology Amirkabir Journal of Civil Engineering 2588-297X 54 6 2022 08 23 The Effect of Fire on the Behavior of Perforated Short Steel Compression Members and Evaluation after Retrofitting The Effect of Fire on the Behavior of Perforated Short Steel Compression Members and Evaluation after Retrofitting 2415 2440 4631 10.22060/ceej.2021.19938.7289 FA Hamed Makhdoumi Ph.D Candidate, Department of Civil Engineering, Sirjan Branch, Islamic Azad University, Sirjan, Iran Reza Rahgozar Department of Civil Engineering, Sirjan Branch, Islamic Azad University, Sirjan, Iran. Mohsen Mohammadizadeh Department of Civil Engineering, Sirjan Branch, Islamic Azad University, Sirjan, Iran. Amir Saedi Daryan Assistant Professor, Faculty of Civil, Water and Environmental Engineering, Shahid Beheshti University, Tehran, Iran Kambiz Narmashiri Assistant Professor, Department of Civil Engineering, Zahedan Branch, Islamic Azad University, Zahedan, Iran 0000-0003-1767-7424 Journal Article 2021 04 25 <span style="letter-spacing: .05pt;">Steel is one of the most widely used materials in structures due to its high strength and speed of execution. One of the most important disadvantages of steel is corrosion damage and low fire resistance. When the temperature of the steel exceeds a certain value, its strength decreases to a great extent; therefore, in this paper, the performance of steel specimens with corrosion and at different temperatures has been investigated. Thus, the corrosion weakness is considered as perforation and specimens with different positions of the perforation in 6 states and the application of heat in 5 different states 20, 100, 250, 500, and 700 are examined and the load-displacement diagrams of each column under axial loading are presented. Then, in order to improve the behavior of the damaged specimens by the two mentioned factors, the perforation location has been reinforced and reinforced using a steel sheet and axial loading was done in two-temperature states of 20 and 700 ° C. The results show that: with increasing temperature, the bearing capacity of specimens has decreased and this reduction has reached up to about 15% for control specimens and up to about 35% for perforated specimens, according to the type of perforation. Also, in steel members retrofitted with steel sheets, the bearing capacity has increased by about 5 to 15 percent (depending on the perforation).</span> <span style="letter-spacing: .05pt;">Steel is one of the most widely used materials in structures due to its high strength and speed of execution. One of the most important disadvantages of steel is corrosion damage and low fire resistance. When the temperature of the steel exceeds a certain value, its strength decreases to a great extent; therefore, in this paper, the performance of steel specimens with corrosion and at different temperatures has been investigated. Thus, the corrosion weakness is considered as perforation and specimens with different positions of the perforation in 6 states and the application of heat in 5 different states 20, 100, 250, 500, and 700 are examined and the load-displacement diagrams of each column under axial loading are presented. Then, in order to improve the behavior of the damaged specimens by the two mentioned factors, the perforation location has been reinforced and reinforced using a steel sheet and axial loading was done in two-temperature states of 20 and 700 ° C. The results show that: with increasing temperature, the bearing capacity of specimens has decreased and this reduction has reached up to about 15% for control specimens and up to about 35% for perforated specimens, according to the type of perforation. Also, in steel members retrofitted with steel sheets, the bearing capacity has increased by about 5 to 15 percent (depending on the perforation).</span> https://ceej.aut.ac.ir/article_4631_3b3fff6463464959dcd1b68d0320f781.pdf